"Asynchronous Grant-Free Random Access: Receiver Design With Partially " by Zhaoji Zhang, Yuhao Chi et al.
Massive Machine-Type Communications (mMTC) features a massive number of low-cost user equipment (UE) with sparse activity. Tailor-made for these features, grant-free random access (GF-RA) serves as an efficient access solution for mMTC. However, most existing GF-RA schemes rely on strict synchronization, which incurs excessive coordination burden for the low-cost UEs. In this work, we propose a receiver design for asynchronous GF-RA, and address the joint user activity detection (UAD) and channel estimation (CE) problem in the presence of asynchronization-induced inter-symbol interference. Spe...
Source: uow.edu.au
